:root {
  --blue: #1d4ed8;
  --blue-dark: #1e3a8a;
  --orange: #f97316;
  --orange-dark: #ea580c;
  --ink: #111827;
  --muted: #4b5563;
  --bg: #ffffff;
  --bg-alt: #f3f6fc;
  --line: #e5e7eb;
  --radius: 16px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3 {
  line-height: 1.2;
  color: var(--blue-dark);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
}

.btn--primary:hover {
  background: var(--orange-dark);
}

.btn--ghost {
  border: 2px solid var(--blue);
  color: var(--blue);
}

.btn--ghost:hover {
  background: var(--blue);
  color: #fff;
}

.btn--big {
  font-size: 1.15rem;
  padding: 1rem 2.25rem;
}

/* ---------- Header ---------- */

.top {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

.top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}

.top__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--blue-dark);
  font-weight: 800;
  font-size: 1.1rem;
}

.top__nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.top__nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.top__nav a:hover { color: var(--blue); }

.top__nav a.btn { color: var(--blue); }
.top__nav a.btn:hover { color: #fff; }

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(160deg, #eaf0ff 0%, #ffffff 70%);
  padding: 5rem 0 4.5rem;
}

.hero__inner { text-align: center; }

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900;
}

.hero__lead {
  max-width: 620px;
  margin: 1.25rem auto 2.5rem;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  color: var(--muted);
}

.hero__cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Sections ---------- */

.section { padding: 4rem 0; }

.section--alt { background: var(--bg-alt); }

.section h2 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  text-align: center;
  margin-bottom: 2.5rem;
}

.about {
  max-width: 720px;
  margin: 0 auto 2.5rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.about p + p { margin-top: 1rem; }

/* ---------- Cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 4px 14px rgba(17, 24, 39, 0.05);
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  color: var(--blue);
}

.card p { color: var(--muted); }

/* ---------- Steps ---------- */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.75rem 1.75rem;
}

.step__num {
  position: absolute;
  top: -1.1rem;
  left: 1.5rem;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step p { color: var(--muted); }

/* ---------- Download ---------- */

.download { text-align: center; }

.download p { color: var(--muted); margin-bottom: 1.75rem; }

.download__note {
  margin-top: 1.25rem;
  font-size: 0.9rem;
}

/* ---------- Pomoch page ---------- */

.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  text-align: center;
}

.page-lead {
  text-align: center;
  max-width: 620px;
  margin: 1rem auto 2.75rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.cards--donate { grid-template-columns: repeat(3, 1fr); }

.reqs { font-size: 0.95rem; }

.reqs dt {
  color: var(--muted);
  margin-top: 0.7rem;
}

.reqs dd {
  font-weight: 600;
  word-break: break-word;
}

.note {
  text-align: center;
  color: var(--muted);
  margin-top: 2.5rem;
}

.cta-row {
  text-align: center;
  margin-top: 2rem;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer a { color: var(--blue); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ---------- Responsive ---------- */

@media (max-width: 820px) {
  .cards, .steps, .cards--donate {
    grid-template-columns: 1fr;
  }

  .top__nav a:not(.btn) { display: none; }

  .hero { padding: 3.5rem 0; }
}